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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 12-07-2012, 09:38 AM   #381
Hornung418
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I don't have that option being throttle by cable and all. I would like to have that though!
You can shortly! My conversion is almost done I have all the necessary parts, just waiting on free time to install!

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Old 12-08-2012, 01:36 PM   #382
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Could this help with that problem?

http://www.turnermotorsport.com/p-42...ter-plate.aspx
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Old 12-08-2012, 03:10 PM   #383
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I made my own to fit my tuB25 throttle body onto the B30 intake. Worked perfectly, no grinding of the throttle body needed.
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Old 12-09-2012, 01:04 PM   #384
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The problem was most likely the o2 Sensors.

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Old 12-09-2012, 01:07 PM   #385
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The problem was most likely the o2 Sensors.

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The lean burn problem was definitely the o2 sensors.
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Old 12-09-2012, 01:40 PM   #386
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And the throttle response.

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Old 12-10-2012, 09:14 PM   #387
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Where did you buy your top header flange??? I need one for my turbo build? It has to be mild steel.
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Old 12-12-2012, 05:35 PM   #388
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Where did you buy your top header flange??? I need one for my turbo build? It has to be mild steel.
Ebay.
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Old 12-12-2012, 07:28 PM   #389
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Ebay.
What did you look up? I've been looking for 30 min with no luck.
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Old 12-12-2012, 09:06 PM   #390
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I think the e30, e36, and e46 have the same exhaust bolt pattern.
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Old 12-12-2012, 09:13 PM   #391
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I think the e30, e36, and e46 have the same exhaust bolt pattern.
ty
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Old 03-20-2013, 11:08 PM   #392
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You can shortly! My conversion is almost done I have all the necessary parts, just waiting on free time to install!

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Did you ever get this going?
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Old 03-21-2013, 07:00 AM   #393
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Did you ever get this going?
Heres where it sits now.

Click image for larger version

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Harness is halfway off and my manifold is out for vacuum line removal since I deleted the SAP almost two years ago. No need for the check valve and actuator.

Click image for larger version

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CCV change Had peanut butter in my lines. Whomp whomp.

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Upgraded from the return line to the M54 line and filter with built it FPR. Deleted the external junk around the filter and replaced and relocated the vac line and added the F-connector.

Click image for larger version

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Scored an M54B30 TB for $40. Included a new gasket.

Click image for larger version

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ID:	496490

Ended up with an M54 harness, MS43 DME and synced EWS, 330 MAF, E-Pedal and a new lock set for $300.

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Old 03-21-2013, 01:13 PM   #394
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Update. Went to install the headers last night, turned into a disaster. .
I use this thread as a answer to all the newbs who want to make more power out of their 2.5L. Don't waste time and money like original poster did. He spent a lot of time and money just to see loss in power.

Best upgrade for 323 model E46 is putting in 2.8L rotating assembly, this way you get more power and you don't spend more than $500, and don't touch anything else.
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Old 03-21-2013, 01:23 PM   #395
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Who said I made less power? I never dynod it.

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Old 03-21-2013, 01:24 PM   #396
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Also, who says it was a waste? I had fun doing it and am proud of the work. Let's see some of your Fab work before you call mine a waste.

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Old 03-21-2013, 03:12 PM   #397
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Also, who says it was a waste? I had fun doing it and am proud of the work. Let's see some of your Fab work before you call mine a waste.

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Agreed, I like that you take pride in your work!
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Old 03-21-2013, 03:45 PM   #398
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Who said I made less power? I never dynod it.

Sent
You probably did dyno it but too embarrased to post the results.

Fact is stock air intake is not restrictive at all for 2.5L, same filter size is used on 333hp S54.
Stock cat. converter headers are restrictive but not so much on 2.5L to justify dumping so much money on custom header that weighs much more than stock. You could just use stock 96-99 E36 headers and save money that way.
Upgraded camshafts and intake manifold is another waste on 2.5L because stock just flows fine.
The 2.5L just does not flow that much to make those parts beneficial.

Software upgrade is another waste of money, it is dyno proven time and time again, that tune does not bring any power to the table. Stock euro software is as the agressive as you can get for this engine.

Stock exhaust after the cat. c. is not restrictive at all, it is huge for 2.5L flow, so another waste of money there.

All you can do to 2.5L is install catless headers, drop in K&N filter in stock air box. Get euro stock flash. Thats it, don't do anything else.
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Old 03-21-2013, 04:31 PM   #399
shm21284
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Originally Posted by HakenTT View Post
You probably did dyno it but too embarrased to post the results.

Fact is stock air intake is not restrictive at all for 2.5L, same filter size is used on 333hp S54.
Stock cat. converter headers are restrictive but not so much on 2.5L to justify dumping so much money on custom header that weighs much more than stock. You could just use stock 96-99 E36 headers and save money that way.
Upgraded camshafts and intake manifold is another waste on 2.5L because stock just flows fine.
The 2.5L just does not flow that much to make those parts beneficial.

Software upgrade is another waste of money, it is dyno proven time and time again, that tune does not bring any power to the table. Stock euro software is as the agressive as you can get for this engine.

Stock exhaust after the cat. c. is not restrictive at all, it is huge for 2.5L flow, so another waste of money there.

All you can do to 2.5L is install catless headers, drop in K&N filter in stock air box. Get euro stock flash. Thats it, don't do anything else.
You're cool. Can we be friends?
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Old 03-21-2013, 04:53 PM   #400
shm21284
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Heres where it sits now.

Attachment 496487

Harness is halfway off and my manifold is out for vacuum line removal since I deleted the SAP almost two years ago. No need for the check valve and actuator.

Attachment 496491

CCV change Had peanut butter in my lines. Whomp whomp.

Attachment 496488

Upgraded from the return line to the M54 line and filter with built it FPR. Deleted the external junk around the filter and replaced and relocated the vac line and added the F-connector.

Attachment 496489

Scored an M54B30 TB for $40. Included a new gasket.

Attachment 496490

Ended up with an M54 harness, MS43 DME and synced EWS, 330 MAF, E-Pedal and a new lock set for $300.

Sent from my SCH-I535 using Bimmer App
This is pretty awesome. I'd like to see how this works out. From my scan tool, it appears the engine's flow rate becomes "choked" after 6000 RPM (If I recall correctly, the flow rate only increases by 2 kg/s from 6000-6500, a much smaller rate than from 5500-6000). I suspect that it is throttle body size. Just a suspicion.

With the MS43 DME, I believe one can improve the throttle response with a tune. Talking to an engine calibration engineer at Active Autowerke, he said that there isn't control of the throttle response (delay to shutting the throttle valve when your foot is released from the throttle pedal) on the MS42 ECU. Not sure if this applies to all tunes, but it definitely didn't change on mine after tuned (even with aluminum flywheel), while others with an MS43 ECU claim it does help throttle response.

Last edited by shm21284; 03-21-2013 at 05:18 PM.
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